binutils-gdb/gdb/nto-tdep.c

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/* nto-tdep.c - general QNX Neutrino target functionality.
Copyright (C) 2003, 2004, 2007, 2008 Free Software Foundation, Inc.
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Contributed by QNX Software Systems Ltd.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "gdb_stat.h"
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#include "gdb_string.h"
#include "nto-tdep.h"
#include "top.h"
#include "cli/cli-decode.h"
#include "cli/cli-cmds.h"
#include "inferior.h"
#include "gdbarch.h"
#include "bfd.h"
#include "elf-bfd.h"
#include "solib-svr4.h"
#include "gdbcore.h"
#include "objfiles.h"
#include <string.h>
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#ifdef __CYGWIN__
#include <sys/cygwin.h>
#endif
#ifdef __CYGWIN__
static char default_nto_target[] = "C:\\QNXsdk\\target\\qnx6";
#elif defined(__sun__) || defined(linux)
static char default_nto_target[] = "/opt/QNXsdk/target/qnx6";
#else
static char default_nto_target[] = "";
#endif
struct nto_target_ops current_nto_target;
static char *
nto_target (void)
{
char *p = getenv ("QNX_TARGET");
#ifdef __CYGWIN__
static char buf[PATH_MAX];
if (p)
cygwin_conv_to_posix_path (p, buf);
else
cygwin_conv_to_posix_path (default_nto_target, buf);
return buf;
#else
return p ? p : default_nto_target;
#endif
}
void
nto_set_target (struct nto_target_ops *targ)
{
nto_regset_id = targ->regset_id;
nto_supply_gregset = targ->supply_gregset;
nto_supply_fpregset = targ->supply_fpregset;
nto_supply_altregset = targ->supply_altregset;
nto_supply_regset = targ->supply_regset;
nto_register_area = targ->register_area;
nto_regset_fill = targ->regset_fill;
nto_fetch_link_map_offsets = targ->fetch_link_map_offsets;
}
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/* Take a string such as i386, rs6000, etc. and map it onto CPUTYPE_X86,
CPUTYPE_PPC, etc. as defined in nto-share/dsmsgs.h. */
int
nto_map_arch_to_cputype (const char *arch)
{
if (!strcmp (arch, "i386") || !strcmp (arch, "x86"))
return CPUTYPE_X86;
if (!strcmp (arch, "rs6000") || !strcmp (arch, "powerpc"))
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return CPUTYPE_PPC;
if (!strcmp (arch, "mips"))
return CPUTYPE_MIPS;
if (!strcmp (arch, "arm"))
return CPUTYPE_ARM;
if (!strcmp (arch, "sh"))
return CPUTYPE_SH;
return CPUTYPE_UNKNOWN;
}
int
nto_find_and_open_solib (char *solib, unsigned o_flags, char **temp_pathname)
{
char *buf, *arch_path, *nto_root, *endian, *base;
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const char *arch;
int ret;
#define PATH_FMT "%s/lib:%s/usr/lib:%s/usr/photon/lib:%s/usr/photon/dll:%s/lib/dll"
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nto_root = nto_target ();
if (strcmp (gdbarch_bfd_arch_info (current_gdbarch)->arch_name, "i386") == 0)
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{
arch = "x86";
endian = "";
}
else if (strcmp (gdbarch_bfd_arch_info (current_gdbarch)->arch_name,
"rs6000") == 0
|| strcmp (gdbarch_bfd_arch_info (current_gdbarch)->arch_name,
"powerpc") == 0)
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{
arch = "ppc";
endian = "be";
}
else
{
arch = gdbarch_bfd_arch_info (current_gdbarch)->arch_name;
2007-05-31 Markus Deuling <deuling@de.ibm.com> * xtensa-tdep.c (XTENSA_IS_ENTRY, extract_call_winsize) (xtensa_register_write_masked, xtensa_register_read_masked) (xtensa_extract_return_value, xtensa_store_return_value (xtensa_push_dummy_call, xtensa_breakpoint_from_pc): Replace TARGET_BYTE_ORDER by gdbarch_byte_order. * sh-tdep.c (sh_breakpoint_from_pc, gdb_print_insn_sh) (sh_justify_value_in_reg, sh_next_flt_argreg, sh_push_dummy_call_fpu) (sh_extract_return_value_fpu, sh_store_return_value_fpu): Likewise. * sh64-tdep.c (sh64_breakpoint_from_pc, gdb_print_insn_sh64) (sh64_push_dummy_call, sh64_extract_return_value) (sh64_store_return_value, sh64_register_convert_to_virtual) (sh64_register_convert_to_raw, sh64_pseudo_register_read) (sh64_pseudo_register_write, sh64_do_fp_register) (sh64_frame_prev_register): Likewise. * score-tdep.c (score_print_insn, score_breakpoint_from_pc) (score_return_value, score_push_dummy_call, score_fetch_inst): Likewise. * rs6000-tdep.c (rs6000_breakpoint_from_pc, rs6000_push_dummy_call) (e500_move_ev_register,gdb_print_insn_powerpc): Likewise. * remote-m32r-sdi.c (m32r_resume, m32r_wait): Likewise. * ppc-linux-nat.c (store_register): Likewise. * nto-tdep.c (nto_find_and_open_solib) (nto_init_solib_absolute_prefix): Likewise. * mips-tdep.c (mips_pseudo_register_read, mips_pseudo_register_write) (mips_convert_register_p, mips_eabi_push_dummy_call) (mips_n32n64_push_dummy_call, mips_n32n64_return_value) (mips_o32_push_dummy_call, mips_o32_return_value) (mips_o64_push_dummy_call, mips_o64_return_value, mips_o64_return_value) (mips_read_fp_register_single, mips_read_fp_register_double) (mips_print_register, print_gp_register_row, gdb_print_insn_mips) (mips_breakpoint_from_pc): Likewise. * mipsnbsd-tdep.c (mipsnbsd_sigtramp_offset): Likewise. * mips-linux-tdep.c (mips64_supply_fpregset, mips64_fill_fpregset) (mips_linux_o32_sigframe_init): Likewise. * m32r-tdep.c (m32r_memory_insert_breakpoint) (m32r_memory_remove_breakpoint, m32r_breakpoint_from_pc): Likewise. * libunwind-frame.c (libunwind_frame_cache, libunwind_frame_sniffer) (libunwind_sigtramp_frame_sniffer, libunwind_get_reg_special): Likewise. * iq2000-tdep.c (iq2000_breakpoint_from_pc): Likewise. * coffread.c (process_coff_symbol): Likewise. * arm-tdep.c (convert_from_extended, convert_to_extended) (gdb_print_insn_arm): Likewise.
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endian = gdbarch_byte_order (current_gdbarch)
== BFD_ENDIAN_BIG ? "be" : "le";
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}
/* In case nto_root is short, add strlen(solib)
so we can reuse arch_path below. */
arch_path =
alloca (strlen (nto_root) + strlen (arch) + strlen (endian) + 2 +
strlen (solib));
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sprintf (arch_path, "%s/%s%s", nto_root, arch, endian);
buf = alloca (strlen (PATH_FMT) + strlen (arch_path) * 5 + 1);
sprintf (buf, PATH_FMT, arch_path, arch_path, arch_path, arch_path,
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arch_path);
/* Don't assume basename() isn't destructive. */
base = strrchr (solib, '/');
if (!base)
base = solib;
else
base++; /* Skip over '/'. */
ret = openp (buf, 1, base, o_flags, 0, temp_pathname);
if (ret < 0 && base != solib)
{
sprintf (arch_path, "/%s", solib);
ret = open (arch_path, o_flags, 0);
if (temp_pathname)
{
if (ret >= 0)
*temp_pathname = gdb_realpath (arch_path);
else
**temp_pathname = '\0';
}
}
return ret;
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}
void
nto_init_solib_absolute_prefix (void)
{
char buf[PATH_MAX * 2], arch_path[PATH_MAX];
char *nto_root, *endian;
const char *arch;
nto_root = nto_target ();
if (strcmp (gdbarch_bfd_arch_info (current_gdbarch)->arch_name, "i386") == 0)
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{
arch = "x86";
endian = "";
}
else if (strcmp (gdbarch_bfd_arch_info (current_gdbarch)->arch_name,
"rs6000") == 0
|| strcmp (gdbarch_bfd_arch_info (current_gdbarch)->arch_name,
"powerpc") == 0)
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{
arch = "ppc";
endian = "be";
}
else
{
arch = gdbarch_bfd_arch_info (current_gdbarch)->arch_name;
2007-05-31 Markus Deuling <deuling@de.ibm.com> * xtensa-tdep.c (XTENSA_IS_ENTRY, extract_call_winsize) (xtensa_register_write_masked, xtensa_register_read_masked) (xtensa_extract_return_value, xtensa_store_return_value (xtensa_push_dummy_call, xtensa_breakpoint_from_pc): Replace TARGET_BYTE_ORDER by gdbarch_byte_order. * sh-tdep.c (sh_breakpoint_from_pc, gdb_print_insn_sh) (sh_justify_value_in_reg, sh_next_flt_argreg, sh_push_dummy_call_fpu) (sh_extract_return_value_fpu, sh_store_return_value_fpu): Likewise. * sh64-tdep.c (sh64_breakpoint_from_pc, gdb_print_insn_sh64) (sh64_push_dummy_call, sh64_extract_return_value) (sh64_store_return_value, sh64_register_convert_to_virtual) (sh64_register_convert_to_raw, sh64_pseudo_register_read) (sh64_pseudo_register_write, sh64_do_fp_register) (sh64_frame_prev_register): Likewise. * score-tdep.c (score_print_insn, score_breakpoint_from_pc) (score_return_value, score_push_dummy_call, score_fetch_inst): Likewise. * rs6000-tdep.c (rs6000_breakpoint_from_pc, rs6000_push_dummy_call) (e500_move_ev_register,gdb_print_insn_powerpc): Likewise. * remote-m32r-sdi.c (m32r_resume, m32r_wait): Likewise. * ppc-linux-nat.c (store_register): Likewise. * nto-tdep.c (nto_find_and_open_solib) (nto_init_solib_absolute_prefix): Likewise. * mips-tdep.c (mips_pseudo_register_read, mips_pseudo_register_write) (mips_convert_register_p, mips_eabi_push_dummy_call) (mips_n32n64_push_dummy_call, mips_n32n64_return_value) (mips_o32_push_dummy_call, mips_o32_return_value) (mips_o64_push_dummy_call, mips_o64_return_value, mips_o64_return_value) (mips_read_fp_register_single, mips_read_fp_register_double) (mips_print_register, print_gp_register_row, gdb_print_insn_mips) (mips_breakpoint_from_pc): Likewise. * mipsnbsd-tdep.c (mipsnbsd_sigtramp_offset): Likewise. * mips-linux-tdep.c (mips64_supply_fpregset, mips64_fill_fpregset) (mips_linux_o32_sigframe_init): Likewise. * m32r-tdep.c (m32r_memory_insert_breakpoint) (m32r_memory_remove_breakpoint, m32r_breakpoint_from_pc): Likewise. * libunwind-frame.c (libunwind_frame_cache, libunwind_frame_sniffer) (libunwind_sigtramp_frame_sniffer, libunwind_get_reg_special): Likewise. * iq2000-tdep.c (iq2000_breakpoint_from_pc): Likewise. * coffread.c (process_coff_symbol): Likewise. * arm-tdep.c (convert_from_extended, convert_to_extended) (gdb_print_insn_arm): Likewise.
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endian = gdbarch_byte_order (current_gdbarch)
== BFD_ENDIAN_BIG ? "be" : "le";
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}
sprintf (arch_path, "%s/%s%s", nto_root, arch, endian);
sprintf (buf, "set solib-absolute-prefix %s", arch_path);
execute_command (buf, 0);
}
char **
nto_parse_redirection (char *pargv[], char **pin, char **pout, char **perr)
{
char **argv;
char *in, *out, *err, *p;
int argc, i, n;
for (n = 0; pargv[n]; n++);
if (n == 0)
return NULL;
in = "";
out = "";
err = "";
argv = xcalloc (n + 1, sizeof argv[0]);
argc = n;
for (i = 0, n = 0; n < argc; n++)
{
p = pargv[n];
if (*p == '>')
{
p++;
if (*p)
out = p;
else
out = pargv[++n];
}
else if (*p == '<')
{
p++;
if (*p)
in = p;
else
in = pargv[++n];
}
else if (*p++ == '2' && *p++ == '>')
{
if (*p == '&' && *(p + 1) == '1')
err = out;
else if (*p)
err = p;
else
err = pargv[++n];
}
else
argv[i++] = pargv[n];
}
*pin = in;
*pout = out;
*perr = err;
return argv;
}
/* The struct lm_info, LM_ADDR, and nto_truncate_ptr are copied from
solib-svr4.c to support nto_relocate_section_addresses
which is different from the svr4 version. */
struct lm_info
{
/* Pointer to copy of link map from inferior. The type is char *
rather than void *, so that we may use byte offsets to find the
various fields without the need for a cast. */
char *lm;
};
static CORE_ADDR
LM_ADDR (struct so_list *so)
{
struct link_map_offsets *lmo = nto_fetch_link_map_offsets ();
return extract_typed_address (so->lm_info->lm + lmo->l_addr_offset,
builtin_type_void_data_ptr);
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}
static CORE_ADDR
nto_truncate_ptr (CORE_ADDR addr)
{
if (gdbarch_ptr_bit (current_gdbarch) == sizeof (CORE_ADDR) * 8)
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/* We don't need to truncate anything, and the bit twiddling below
will fail due to overflow problems. */
return addr;
else
return addr & (((CORE_ADDR) 1 << gdbarch_ptr_bit (current_gdbarch)) - 1);
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}
Elf_Internal_Phdr *
find_load_phdr (bfd *abfd)
{
Elf_Internal_Phdr *phdr;
unsigned int i;
if (!elf_tdata (abfd))
return NULL;
phdr = elf_tdata (abfd)->phdr;
for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
{
if (phdr->p_type == PT_LOAD && (phdr->p_flags & PF_X))
return phdr;
}
return NULL;
}
void
nto_relocate_section_addresses (struct so_list *so, struct section_table *sec)
{
/* Neutrino treats the l_addr base address field in link.h as different than
the base address in the System V ABI and so the offset needs to be
calculated and applied to relocations. */
Elf_Internal_Phdr *phdr = find_load_phdr (sec->bfd);
unsigned vaddr = phdr ? phdr->p_vaddr : 0;
sec->addr = nto_truncate_ptr (sec->addr + LM_ADDR (so) - vaddr);
sec->endaddr = nto_truncate_ptr (sec->endaddr + LM_ADDR (so) - vaddr);
}
/* This is cheating a bit because our linker code is in libc.so. If we
ever implement lazy linking, this may need to be re-examined. */
int
nto_in_dynsym_resolve_code (CORE_ADDR pc)
{
if (in_plt_section (pc, NULL))
return 1;
return 0;
}
void
nto_generic_supply_gpregset (const struct regset *regset,
struct regcache *regcache, int regnum,
const void *gregs, size_t len)
{
}
void
nto_generic_supply_fpregset (const struct regset *regset,
struct regcache *regcache, int regnum,
const void *fpregs, size_t len)
{
}
void
nto_generic_supply_altregset (const struct regset *regset,
struct regcache *regcache, int regnum,
const void *altregs, size_t len)
{
}
void
nto_dummy_supply_regset (struct regcache *regcache, char *regs)
{
/* Do nothing. */
}
enum gdb_osabi
nto_elf_osabi_sniffer (bfd *abfd)
{
if (nto_is_nto_target)
return nto_is_nto_target (abfd);
return GDB_OSABI_UNKNOWN;
}
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void
nto_initialize_signals (void)
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{
/* We use SIG45 for pulses, or something, so nostop, noprint
and pass them. */
signal_stop_update (target_signal_from_name ("SIG45"), 0);
signal_print_update (target_signal_from_name ("SIG45"), 0);
signal_pass_update (target_signal_from_name ("SIG45"), 1);
/* By default we don't want to stop on these two, but we do want to pass. */
#if defined(SIGSELECT)
signal_stop_update (SIGSELECT, 0);
signal_print_update (SIGSELECT, 0);
signal_pass_update (SIGSELECT, 1);
#endif
#if defined(SIGPHOTON)
signal_stop_update (SIGPHOTON, 0);
signal_print_update (SIGPHOTON, 0);
signal_pass_update (SIGPHOTON, 1);
#endif
}
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void
_initialize_nto_tdep (void)
{
add_setshow_zinteger_cmd ("nto-debug", class_maintenance,
&nto_internal_debugging, _("\
Set QNX NTO internal debugging."), _("\
Show QNX NTO internal debugging."), _("\
When non-zero, nto specific debug info is\n\
displayed. Different information is displayed\n\
for different positive values."),
NULL,
NULL, /* FIXME: i18n: QNX NTO internal debugging is %s. */
&setdebuglist, &showdebuglist);
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}